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Synthesis of rare earth metal oxide nanocomposites with carbon as electrodes for supercapacitors
(UMT, Lahore, 2021) ANAM
Herein this study, successful synthesis of Cerium oxide/Carbon (CeO2/C), Holmium oxide/Carbon (Ho2O3/C) and Praseodymium oxide (Pr6O11/C) nanocomposites have been carried out by using the hydrothermal method. X-ray Diffraction, Field Emission Scanning Electron Microscopy and electrochemical characterizations have been employed to analyze the characteristics of all prepared materials. The structural analysis via X-ray diffraction results has revealed the polycrystalline nature and pure phase of synthesized materials. FESEM-based surface morphological studies have confirmed the increased porosity of CeO2/C nano composite and the average grain size is about 28 nm -34 nm. N2-sorption analysis indicated the type II characteristic isotherm and H3 hysteresis loop which indicates type IV isotherms which confirms that the materials are of macro porous and mesoporous nature. More dominant behavior is mesoporous. CV analysis of nanocomposites has shown Pseudo capacitive storage mechanism. The GCD test has revealed that CeO2/C nano composite has shown a maximum specific capacitance of 100 F/g. EIS plot gives a good agreement of solution resistance of electrodes at about 1 Ω. CeO2/C nanocomposites have shown the best specific capacitance among the other two prepared nanocomposites and have the potential to be used as an electrode material for super capacitor